Petals 2-cleft nearly to base or absent; plants densely cushionlike, glabrous or pubescent or woolly; stamens 5 or (8--)10.

• 花瓣2半裂近基部或无；浓密垫状的植株，无毛或被短柔毛或具绵毛；雄蕊5或(8-)10。(14